Random()
{
time_t nowtime;
struct tm* now;
::time( &nowtime);
now = ::localtime( &nowtime);
m_value = uint32_hash( ((now->tm_year+1)
* (now->tm_mon+100)
* (now->tm_mday+1)));
}
unsigned int get( unsigned int min_, unsigned int max_)
{
if (min_ >= max_)
{
throw std::runtime_error("illegal range passed to pseudo random number generator");
}
m_value = uint32_hash( m_value + 1);
unsigned int iv = max_ - min_;
if (iv)
{
return (m_value % iv) + min_;
}
else
{
return min_;
}
}
bool gui::define_glyph(gui::bitmap_font_t *font, gui::bitmap_glyph_t const *glyph, size_t i)
{
uint32_t bucket = uint32_hash(glyph->Codepoint) & (font->BucketCount - 1);
uint32_t count = font->GTable[bucket][FONT_SIZE_INDEX];
uint32_t nmax = font->GTable[bucket][FONT_CAPACITY_INDEX];
if (count == nmax)
{
size_t n = (nmax < 256) ? nmax * 2 : nmax + 256;
uint32_t *b = (uint32_t *) realloc(font->GTable[bucket], n * sizeof(uint32_t));
if (b == NULL) return false;
font->GTable[bucket] = b;
font->GTable[bucket][FONT_CAPACITY_INDEX] = uint32_t(n);
}
font->GTable[bucket][FONT_SIZE_INDEX]++;
font->GTable[bucket][count] = uint32_t(i);
font->Glyphs[i] =*glyph;
return true;
}
void gui::measure_string(gui::bitmap_font_t const *font, char const *str, size_t *out_w, size_t *out_h)
{
if (str != NULL)
{
size_t l = 0; // length, in characters
size_t w = 0; // total width, in pixels
size_t h = 0; // total height, in pixels
uint32_t c = 0; // current UTF-8 codepoint, 0xFFFFFFFFU = invalid
uint32_t p = 0; // previous UTF-8 codepoint, 0xFFFFFFFFU = invalid
uint32_t const m = uint32_t(font->BucketCount - 1);
char const *n = next_codepoint(str, c);
while (c != 0)
{
uint32_t bucket = uint32_hash(c) & m;
uint32_t const *table = font->GTable[bucket];
uint32_t const count = font->GTable[bucket][FONT_SIZE_INDEX];
for (size_t i = FONT_CODEPOINT_OFFSET; i < FONT_CODEPOINT_OFFSET + count; ++i)
{
if (table[i] == c)
{
size_t gi = table[i]; // the index in into font->Glyphs.
w += advance_x(font, p, c, font->Glyphs[gi].AdvanceX);
break;
}
}
if (c == '\n') h += font->LineHeight;
p = c;
n = next_codepoint(n, c);
l++;
}
if (l > 0) h += font->LineHeight;
if (out_w)*out_w = w;
if (out_h)*out_h = h;
}
else
{
if (out_w) *out_w = 0;
if (out_h) *out_h = 0;
}
}
/*
* Hashing function for a string
*/
unsigned int hashmap_hash_int(hashmap_map * m, char* keystring){
return uint32_hash((unsigned char*)(keystring), strlen(keystring)) % m->table_size;
}
